SymSim: Symbolic Fault Simulation of Data- ow Data-path Designs at the Register-Transfer Level

  • Authors:
  • Sitaram Yadavalli;Sudhakar M. Reddy

  • Affiliations:
  • -;-

  • Venue:
  • ITC '99 Proceedings of the 1999 IEEE International Test Conference
  • Year:
  • 1999

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Abstract

This paper presents a technique and tool (Sym-Sim) for symbolic fault-simulation of data-pathsspecified at the Register-Transfer Level (RTL) constrained by specific control sequences. SymSimachieves this using a symbolic value system suitablefor RTL simulation. It also computes and maintainsinput dependency information at each node in thedesign using a novel artifact called Dependency Setwhich at any time-frame contains all primary inputsymbols that effect the current value on that node.Symbolic fault-simulation can be used along with asymbolic test-generator to detect multiple faults witha single test to reduce test length and and generationtime.